PHP Manual: Checks whether a property is initialized

Description

public bool ReflectionProperty::isInitialized(objectnull $object = null)

Checks whether a property is initialized.

Parameters

object: If the property is non-static an object must be provided to fetch the property from.

Return Values

Returns false for typed properties prior to initialization, and for properties that have been explicitly unset. For all other properties true will be returned.

Errors/Exceptions

Throws a ReflectionException if the property is inaccessible. You can make a protected or private property accessible using ReflectionProperty::setAccessible.

Changelog

Version	Description
8.0.0	`object` is nullable now.

Examples

Example #1 ReflectionProperty::isInitialized example

<?php
class User
{
    public string $name;
}

$rp = new ReflectionProperty('User', 'name');
$user = new User;
var_dump($rp->isInitialized($user));
$user->name = 'Nikita';
var_dump($rp->isInitialized($user));
?>

The above example will output:

bool(false)
bool(true)

ReflectionProperty::isInitialized